Storyline courtesy of Movie Insider:
The infamous Riddick has been left for dead on a sun-scorched planet
that appears to be lifeless. Soon, however, he finds himself fighting
for survival against alien predators more lethal than any human he’s
encountered. The only way off is for Riddick to activate an emergency
beacon and alert mercenaries who rapidly descend to the planet in search
of their bounty. The first ship to arrive carries a new breed of
merc, more lethal and violent, while the second is captained by a man
whose pursuit of Riddick is more personal. With time running out and a
storm on the horizon that no one could survive, his hunters won’t leave
the planet without Riddick’s head as their trophy.
